verify: check that the block size is big enough
authorJens Axboe <axboe@kernel.dk>
Tue, 24 Sep 2019 08:43:39 +0000 (02:43 -0600)
committerJens Axboe <axboe@kernel.dk>
Tue, 24 Sep 2019 08:43:39 +0000 (02:43 -0600)
Fixes: https://github.com/axboe/fio/issues/822
Signed-off-by: Jens Axboe <axboe@kernel.dk>
verify.c

index 48ba051..37d2be8 100644 (file)
--- a/verify.c
+++ b/verify.c
@@ -1191,6 +1191,10 @@ static void populate_hdr(struct thread_data *td, struct io_u *io_u,
 
        fill_hdr(td, io_u, hdr, header_num, header_len, io_u->rand_seed);
 
+       if (header_len <= hdr_size(td, hdr)) {
+               td_verror(td, EINVAL, "Blocksize too small");
+               return;
+       }
        data_len = header_len - hdr_size(td, hdr);
 
        data = p + hdr_size(td, hdr);